The present invention relates to a complex machining turning center.

DE 3824602 A1 discloses a complex machining turning center according to the preamble of claim 1 in which a dual post is arranged to be moved on a bed along an X-axis by a slide rest, a tail stock is arranged to be moved along a Z-axis direction and a headstock is arranged to be moved in a C-axis direction, the complex machining turning center comprising B-axis swing movement unit which allows a headstock to swing along a B-axis on a plane coordinate formed by the X-axis and the Z-axis. The tool post is moveable along an Y-axis upward and downward.

As representative machine tools, there are a lathe, a milling machine, a machining center, and the like. Among the machine tools, the lathe is called a turning center, and serves to rapidly rotate a workpiece to be machined, bring a tool into contact with the workpiece, and machine the workpiece.

FIG. 1 is an image of a turning center according to the prior art.

Referring to FIG. 1, the turning center in the prior art has a 3-axis movement structure in which a tool post 3 on a bed 1 is moved along an X-axis by a slide rest 4, a tailstock 5 is moved in a Z-axis direction, and a headstock 2 is moved in a C-axis direction, and the workpiece is machined by the movement, conveyance or rotation in the X-axis, Z-axis and C-axis directions.

However, in a case in which the turning center has the structure illustrated in FIG. 1, simple machining of the workpiece can be performed, but complex machining of the workpiece is actually difficult to be performed.

It is possible to make a total of 5-axis movement (conveyance) structure in addition to the existing 3-axis conveyance structure where it is possible to perform a Y-axis up/down movement in which the headstock 2 is moved upward and downward along a Y-axis that crosses an X-axis and a Z-axis of FIG. 1, and it is possible to perform a B-axis swing movement in which the headstock 2 swings on a plane coordinate formed by the X-axis and the Z-axis, and as a result, it is expected that complex machining of the workpiece will become easy, such that researches and developments thereof are required.

Accordingly, the present disclosure has been made to solve the aforementioned problems, and an object of the present disclosure is to provide a complex machining turning center which is improved to be capable of easily performing complex machining by making it possible for a headstock to perform a Y-axis up/down movement and a B-axis swing movement in addition to an existing 3-axis movement structure.

In order to achieve the aforementioned object, the present disclosure provides a complex machining turning center as defined in claim 1.

In addition, the present disclosure further provides the following exemplary embodiments regarding to the exemplary embodiment of the present disclosure.

According to the exemplary embodiment of the present disclosure, the B-axis swing movement unit may include a B-axis coupling which connects the B-axis swing power generating unit to the swing power transmission unit.

According to the exemplary embodiment of the present disclosure, the swing unit may be a roller gear cam, and the swing power transmission unit may be a worm shaft that engages with the roller gear cam.

According to the exemplary embodiment of the present disclosure, both end portions of the worm shaft may be supported by bearings.

According to the exemplary embodiment of the present disclosure, the Y-axis up/down movement unit may include a Y-axis coupling which connects the power transmission unit to the Y-axis power generating unit; and a feed box which supports the power transmission unit and the Y-axis power generating unit, and has a bearing disposed therein.

According to the exemplary embodiment of the present disclosure, the power transmission unit may be a ball screw.

According to the exemplary embodiment of the present disclosure, the B-axis swing power generating unit and the Y-axis power generating unit may be servomotors.

According to the present disclosure, complex machining may be easily performed by improving the turning center by making it possible for the headstock to perform the Y-axis up/down movement and the B-axis swing movement in addition to the existing 3-axis movement structure.

• FIG. 1 is an image of a turning center according to the prior art.
• FIG. 2 is an image of a complex machining turning center according to an exemplary embodiment of the present disclosure.
• FIG. 3 is a perspective view that corresponds to FIG. 2.
• FIG. 4 is an enlarged view of main parts of FIG. 3, which is a view illustrating a Y-axis up/down movement of a headstock.
• FIG. 5 is an enlarged view of main parts of FIG. 3, which is a view illustrating a B-axis swing movement of a headstock.
• FIGS. 6 and 7 are cut-away perspective views of main parts of FIG. 3 for explaining the Y-axis up/down movement unit and the B-axis swing movement unit, respectively.
• FIGS. 8 and 9 are cross-sectional views of main parts of FIG. 3 for explaining the Y-axis up/down movement unit and the B-axis swing movement unit, respectively.

• 101: Bed
• 102: Headstock
• 103: Tool post
• 104: Slide rest
• 105: Tailstock
• 110: B-axis swing movement unit
• 111: B-axis body
• 112: B-axis servomotor
• 113: Roller gear cam
• 114: Worm shaft
• 115: B-axis coupling
• 116: Bearing
• 120: Y-axis up/down movement unit
• 121: Y-axis servomotor
• 122: Ball screw
• 123: Y-axis guide
• 124: Feed box
• 125: Y-axis coupling
• 126: Bearing

Hereinafter, the present disclosure will be described with reference to the accompanying drawings.

FIG. 2 is an image of a complex machining turning center according to an exemplary embodiment of the present disclosure, FIG. 3 is a perspective view that corresponds to FIG. 2, FIG. 4 is an enlarged view of main parts of FIG. 3, which is a view illustrating a Y-axis up/down movement of a headstock, FIG. 5 is an enlarged view of main parts of FIG. 3, which is a view illustrating a B-axis swing movement of a headstock, FIGS. 6 and 7 are cut-away perspective views of main parts of FIG. 3 for explaining the Y-axis up/down movement unit and the B-axis swing movement unit, respectively, and FIGS. 8 and 9 are cross-sectional views of main parts of FIG. 3 for explaining the Y-axis up/down movement unit and the B-axis swing movement unit, respectively.

Referring to FIGS. 2 to 5 first among the accompanying drawings, a complex machining turning center according to an exemplary embodiment of the present disclosure includes a 3-axis movement structure in which a tool post 103 is moved on a bed 101 along an X-axis by a slide rest 104, a tailstock 105 is moved along a Z-axis direction, and a headstock 102 is moved in a C-axis direction.

The 3-axis movement structure is identically applied to the general turning center that has been described with reference to FIG. 1.

However, in addition to the aforementioned 3-axis movement structure, the complex machining turning center according to the exemplary embodiment of the present disclosure further includes a Y-axis up/down movement structure in which the headstock 102 is moved upward and downward along a Y-axis that crosses the X-axis and a Z-axis of FIG. 2, and a B-axis swing movement structure in which the headstock 102 swings on a plane coordinate formed by the X-axis and the Z-axis of FIG. 2, and as a result of, it is possible to make a total of 5-axis movement (conveyance) structure.

Therefore, unlike the prior art, it is possible to perform various machining work from simple machining of a workpiece to complex machining of the workpiece.

In the complex machining turning center according to the present disclosure, the tool post 103 is moved on the bed 101 along the X-axis by the slide rest 104, the tailstock 105 is moved in the Z-axis direction, and the headstock 102 is moved in the C-axis direction, and the complex machining turning center includes a B-axis swing movement unit 110 which allows the headstock 102 to swing along the B-axis on the plane coordinate formed by the X-axis and the Z-axis, and a Y-axis up/down movement unit 120 which allows the headstock 102 to be moved upward and downward along the Y-axis that crosses the X-axis and the Z-axis.

First, the B-axis swing movement unit 110, which allows the headstock 102 to swing along the B-axis on the plane coordinate formed by the X-axis and the Z-axis of FIG. 2, will be described specifically.

As illustrated in FIGS. 6 and 8, in the exemplary embodiment of the present disclosure, the B-axis swing movement unit 110 includes a B-axis body 111, a swing unit, a swing power transmission unit, a B-axis swing power generating unit, and a B-axis coupling 115. The swing unit is disposed inside the B-axis body 111. The swing unit is connected with the headstock 102, and performs a swing movement along with the headstock 102. In another exemplary embodiment of the present disclosure, the swing unit may be formed as a roller gear cam 113. The swing power transmission unit engages with the swing unit, and transmits swing power. Preferably, the swing power transmission unit is formed as a worm shaft 114 that engages with the roller gear cam 113. The B-axis swing power generating unit is connected to the swing power transmission unit and generates rotational power. In another preferred exemplary embodiment of the present disclosure, the B-axis swing power generating unit may be formed as a servomotor 112. The swing power transmission unit swings by the rotational power generated by the B-axis swing power generating unit. The B-axis coupling 115 connects the B-axis swing power generating unit to the swing power transmission unit. In the preferred exemplary embodiment of the present disclosure, the B-axis swing movement unit 110 has a structure in which the roller gear cam 113 and the worm shaft 114 are disposed inside the B-axis body 111, and the B-axis servomotor 112 and the worm shaft 114 are directly coupled to each other by the B-axis coupling 115.

Preferably, both end portions of the worm shaft 114 are supported by bearings 116. Therefore, a smooth rotational operation of the worm shaft 114 may be assured.

By the aforementioned configuration, when rotational force in forward and reverse directions of the B-axis servomotor 112 is transmitted to the worm shaft 114 through the B-axis coupling 115, the worm shaft 114 rotates the roller gear cam 113 leftward and rightward in the B-axis direction, which a direction that crosses the work shaft 114, while being rotated in forward and reverse directions. Therefore, the headstock 102 may perform the B-axis swing movement.

Next, the Y-axis up/down movement unit 120, which allows the headstock 102 to be moved upward and downward along the Y-axis that crosses the X-axis and the Z-axis of FIG. 2, will be described specifically.

As illustrated in FIGS. 7 and 9, the Y-axis up/down movement unit 120 includes a Y-axis guide 123, a power transmission unit, a Y-axis power generating unit, a Y-axis coupling 125, and a feed box 124. The Y-axis guide 123 is formed inside the roller gear cam 113, has the same shape as the roller gear cam 113, and is operated along with the headstock 102. The power transmission unit is disposed to be elongated in the Y-axis direction, and connected with the Y-axis guide 123. Preferably, the power transmission unit is formed as a ball screw 122. The Y-axis power generating unit generates power for a Y-axis up/down movement. In another preferred exemplary embodiment of the present disclosure, the Y-axis power generating unit may be formed as a servomotor 121. The Y-axis coupling 125 connects the power transmission unit to the Y-axis power generating unit. The feed box 124 supports the power transmission unit and the Y-axis power generating unit. In addition, the feed box 124 has a bearing 126 disposed therein.

In order for the headstock 102 to be moved upward and downward along the Y-axis, rotational force of the Y-axis servomotor 121 is transmitted to the Y-axis guide 123 through the ball screw 122 when the Y-axis servomotor 121 is operated, and the Y-axis guide 123 is moved upward and downward along the Y-axis along with the headstock 102.

In this case, the roller gear cam 113, which is about to be rotated leftward and rightward by the rotation of the ball screw 122, may be controlled to be moved only downward or upward as the B-axis servomotor 112 maintains a stopped state, as described above. In addition, the Y-axis guide 123, which is formed inside the roller gear cam 113 and has the same shape as the roller gear cam 113, is also rotated leftward and rightward. When the headstock 102 is about to be moved downward and upward along a groove of the ball screw 122 connected with the Y-axis guide 123 when the Y-axis guide 123 is rotated leftward and rightward, the Y-axis servomotor 112 reversely controls the headstock 102 to maintain a current position, and as a result, the B-axis may be controlled only leftward and rightward.

As described above, according to the present disclosure, complex machining may be easily performed by improving the turning center by making it possible for the headstock 102 to perform the Y-axis up/down movement and the B-axis swing movement in addition to the existing 3-axis movement structure.

The present disclosure relates to a complex machining turning center, and more particularly, to a complex machining turning center which is improved to be capable of easily performing complex machining by making it possible for a headstock to perform a Y-axis up/down movement and a B-axis swing movement in addition to an existing 3-axis movement structure.